Listen to this article UK firm Apex Circuit Design has designed the 3.36-mile anticlockwise circuit – which winds around the Hard Rock Stadium in Miami Gardens – with an expected lap time of 1m35s and an average speed of just under 135mph. Paving the track required 24,000 tons of asphalt, which was laid out over 85,000 yards in echelon over three lanes for an average track of 50-feet width. Construction scheduling had to be choreographed around the stadium’s multiple other events including the end of the NFL football season, a jazz music festival and the Miami Open tennis tournament. “Of course, a lot of engineering and analysis has gone into the asphalt itself,” said Apex’s project director Sam Worthy. “The FIA requires the asphalt to be down at least 60 days ahead of the race weekend. We hit that, so it’s going to be well cured before the race happens. “We’re starting to see the limerock aggregate peek through right now becaus …